Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D201/00—Coating compositions based on unspecified macromolecular compounds
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/42—Gloss-reducing agents
• • C09D7/005—
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
  • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
  • B05D3/0493—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases using vacuum
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/04—Coating
  • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D157/00—Coating compositions based on unspecified polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C09D157/06—Homopolymers or copolymers containing elements other than carbon and hydrogen
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
• • C09D7/1283—
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/66—Additives characterised by particle size
  • C09D7/69—Particle size larger than 1000 nm
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
  • B29C51/10—Forming by pressure difference, e.g. vacuum
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2400/00—Characterised by the use of unspecified polymers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K2201/00—Specific properties of additives
  • C08K2201/002—Physical properties
  • C08K2201/003—Additives being defined by their diameter
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K2201/00—Specific properties of additives
  • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K7/00—Use of ingredients characterised by shape
  • C08K7/16—Solid spheres
  • C08K7/18—Solid spheres inorganic
  • C08K7/20—Glass
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2205/00—Polymer mixtures characterised by other features
  • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers

Definitions

• the disclosure relates to a matte sheet, and more particularly to a matte sheet including a matte coating layer that has a predetermined thickness range and a predetermined ratio of a roughness of the matte coating layer and a particle size distribution of a matting agent included in the matte coating layer.
• polystyrene PS
• PMMA polymethyl methacrylate
• PET polyethylene terephthalate
• the conventional matting treatment of the polymer substrates such as addition of an additive (e.g., rubber, a matting agent, etc.) into the polymer substrates or surface embossing of the polymer substrates before forming the matte product, the resulting polymer substrates tend to have relatively low wear resistance and relatively low mechanical strength.
• an additive e.g., rubber, a matting agent, etc.
• the matte coating layer is made from a composition that includes a matting agent, a resin and a cross-linking agent.
• a matting agent e.g., a matting agent
• a resin e.g., a polystyrene
• a cross-linking agent e.g., a polystyrene
• a material As for evaluating gloss of a material, if a material has a 60° gloss less than 10 GU, it will be evaluated as “low gloss.” Furthermore, if the material is presumed to have a much lower gloss, an 85° gloss measurement is applied to the material. At a predetermined measurement angle, the lower the obtained gloss value, the lower the gloss of the material.
• U.S. Patent Application Publication No. 20130131268 A1 discloses a radiation curable liquid coating composition that includes a multifunctional (meth)acrylated oligomer, C 8 to C 20 monofunctional aliphatic alkyl (meth)acrylate, a monomeric reactive diluent, and a matting agent.
• a coating layer that is made from the radiation curable liquid coating composition has a 60° gloss less than 15 GU, and has an 85° gloss not greater than 80 GU.
• the coating layer based on the acrylic acid-based composition of this patent can be dried quickly and polished and has chemical resistance. However, this patent is silent on making an improvement on surface gloss by means of adjustment of a particle size of the matting agent and roughness of a surface of the coating layer.
• U.S. Patent Application Publication No. 20100035026 A1 discloses a low gloss sheet that includes a substrate and a coating layer formed on the substrate.
• the coating layer has 1 wt % of a filling agent, and has a 60° gloss less than 20 GU.
• gloss value of the coating layer needs to be improved so as to be applied to products requiring much lower gloss, such as those with an 85° gloss.
• an object of the disclosure is to provide a matte sheet that can alleviate at least one of the drawbacks of the prior art.
• the matte sheet includes a substrate and a matte coating layer formed on the substrate.
• the matte coating layer has an average thickness ranging from 2.5 ⁇ m to 6 ⁇ m and is made from a coating composition that includes a matting agent.
• the matte coating layer satisfyies an inequality formula of 5 ⁇ d 50 /Ra ⁇ 11, in which d 50 stands for a particle size distribution of the matting agent and Ra stands for a roughness of the matte coating layer.
• a matte product has an 85° gloss ranging from 6 GU to 24 GU, and is made from the abovementioned matte sheet through forming techniques.
• An embodiment of a matte sheet according to the disclosure includes a substrate, and a matte coating layer that is formed on the substrate.
• the substrate may be made from a polymer material selected from polyester, polycarbonate, polyolefin, polyamide, etc., and may have a thickness ranging between 0.3 mm and 1.8 mm.
• the matte coating layer is formed on a surface of the substrate, and is made from a coating composition including a matting agent. More specifically, the coating composition further includes a resin component and a cross-linking agent in addition to the matting agent.
• the resin component Species and properties of the resin component are unlimited and depend upon required properties of the intended matte product made therefrom.
• Non-limiting examples of the resin component include polyurethane, polyester, polymethyl acrylate, and combinations thereof.
• the resin component may be a waterborne resin so as to reduce or avoid use of organic solvents.
• Non-limiting examples of the waterborne resin include waterborne polyurethane, waterborne polyester, waterborne polymethyl acrylate, and combinations thereof.
• the matting agent included in the coating composition of the matte coating layer is in particulate form to make the matte coating layer to have a rough surface.
• the matting agent unlimitedly includes an inorganic matting agent, such as mineral particles, etc., an organic matting agent, such as resin particles, etc., or combinations thereof.
• the mineral particles serve as the matting agent, and are exemplified to be silicon dioxide particles.
• the commercial products of the silicon dioxide particles include Sunsphere® Series-H products available from Asahi Glass Co., Ltd., Japan, such as SUNSPHERE® H-51 and SUNSPHERE® H-121.
• the matting agent has a particle size distribution (d 50 ) ranging from 5 ⁇ m to 8 ⁇ m.
• the matte coating layer satisfies an inequality formula of 5 ⁇ d 50 /Ra ⁇ 11, in which Ra stands for a roughness of the matte coating layer.
• the matte coating layer is evenly coated on the substrate and has a relatively great matting effect.
• the particle size distribution (d 50 ) of the matting agent ranges between 5.5 ⁇ m and 7.5 ⁇ m, so that the surface roughness of the matte coating layer can be improved, and that the coating composition cannot be easily sedimentated or aggregated.
• the matting agent may be in an amount ranging from 10 parts to 20 parts by weight based on 100 parts by weight of the waterborne resin. Therefore, the matting agent can be uniformly dispersed in the coating composition, and the matte coating layer thus formed can have relatively great matting effect and abrasion resistance.
• the cross-linking agent is used for mixing with the resin component to carry out formation of cross-links therebetween.
• Types and an amount of the cross-linking agent are unlimitedly adjustable based on the selected resin component.
• Non-limiting examples of the cross-linking agent include aziridine-based cross-linking agents, carbodiimide-based cross-linking agents, isocyanate-based cross-linking agents, silane-based cross-linking agents, etc.
• a non-limiting example of a commercial product of the aziridine-based cross-linking agents is CX-100 ® (available from Koninklijke DSM N.V.).
• the cross-linking agent may unlimitedly be in an amount ranging between 1 part by weight and 10 parts by weight based on 100 parts by weight of the resin component.
• the amount of the cross-linking agent ranges between 3 parts and 5 parts by weight based on 100 parts by weight of the resin component.
• the coating composition may further include a solvent or at least one functional additive based on actual applications.
• a solvent is water
• the functional additive include a leveling agent, a dispersant, a defoamer, etc.
• the coating composition may include one or more types of the functional additives.
• An amount of the functional additive is adjustable based on actual applications. The amount of the functional additives may range from greater than 0 to 5 parts by weight based on 100 parts by weight of the resin component.
• a method of making the coating composition may include mixing the resin component, the matting agent, the cross-linking agent, the solvent and the optional functional additives until a stable viscosity is achieved.
• a method of making the matte coating layer may include coating the coating composition on the surface of the substrate, and then curing the coating composition. Specifically, the curing step may be conducted using baking techniques. The solvent can be removed and the resin component and the cross-linking agent can be cross-linked during the baking process so as to form the matte coating layer from the cured coating composition.
• the matte coating layer may have an average thickness ranging from 3 ⁇ m to 5.5 ⁇ m so as to have improved abrasion resistance and adhesion to the substrate.
• the matte coating layer may have a roughness (Ra) ranging from 0.5 ⁇ m to 1.4 ⁇ m so that the gloss of the matte coating layer can be further reduced.
• the matte product is made from the aforesaid matte sheet using forming techniques, such as vacuum forming techniques.
• the vacuum forming techniques may include heating and softening the matte sheet, placing the softened matte sheet over a mold, vacuum-stretching and shaping the softened matte sheet in the mold, and then cooling the shaped matte sheet to form the matte product. Heating and softening of the matte sheet may be conducted at a heating temperature ranging from 300° C. to 500° C. for a period of time ranging from 3 seconds to 30 seconds.
• the stretching force applied in the vacuum-stretching operation is controllable based on actual requests of the matte product.
• the matte product may have a stretch ratio ranging from 1 to 4.
• the matte sheet has an 85° gloss not greater than 15 GU.
• the matte product has an 85° gloss not greater than 25 GU.
• a resin component is prepared based on a composition shown in Table 1.
• the resin component is then mixed with a matting agent, a cross-linking agent and a dispersant based on the composition shown in Table 1 so as to obtain a reactant mixture.
• the reactant mixture is then stirred at a stirring speed ranging between 500 rpm and 1000 rpm until the reactant mixture has a stable viscosity so as to form a coating composition.
• the coating composition is then held in place for 4 hours and no sedimentation is observed.
• the coating composition is spread on a surface of a polyester substrate that has a thickness of 0.5 mm using a bar spreader.
• the polyester substrate and the coating composition coated thereon are baked together in an oven at a temperature of 70° C. for 2 minutes.
• the matte sheet that includes the polyester substrate formed with the matte coating layer is formed.
• Matte sheets of Examples 2 to 6 and Comparative Examples 1 to 4 are made in a manner similar to that of Example 1 except that the dispersants and the matting agents are prepared in accordance with the compositions shown in Table 1.
• the matte products are made from the matte sheets obtained from Examples 1 to 6 and Comparative Examples 1 to 4 through vacuum forming techniques.
• the matte sheets obtained from Examples 1 to 6 and Comparative Examples 1 to 4 are respectively heated and softened at a temperature of 500° C. for 4.8 seconds, and the softened matte sheets are formed under vacuum in a vacuum forming machine (Model No. FASP6512, available from CHII KAE MACHINERY CO., LTD., Taiwan) until the softened matte sheets are shaped, followed by cooling of the shaped matte sheets to form the matte products.
• Particle size distribution (d 50 ) the particle size distributions (d 50 ) of the matting agents respectively used in Examples 1 to 6 and Comparative Examples 1 to 4 are measured with a particle size analyzer (Model No. Coulter LS230, available from Beckman Coulter Inc., Fullerton, Calif., USA.) according to the analysis method of ISO 13320-1.
• Average thickness of the matte coating layer the average thicknesses of the matte coating layers respectively formed in Examples 1 to 6 and Comparative Examples 1 to 4 are measured using a scanning electron microscope (Model No. JSM-6390, manufactured by JEOL Ltd., Japan).
• Roughness of the matte coating layer (Ra): roughness of the matte coating layers respectively formed in Examples 1 to 6 and Comparative Examples 1 to 4 is measured with a microfigure measuring instrument (Model No. ET4000A, manufactured by Kosaka Laboratory Ltd., Japan).
• 85° gloss the 85° gloss of the matte sheets of Examples 1 to 6 and Comparative Examples 1 to 4 and the matte products of Examples 1 to 6 and Comparative Examples 1 to 4 is measured at a gloss measurement angle of about 85° according to methods of ASTM D2457 and ASTM D523 with a gloss meter (Model No. GL0030, manufactured by TQC Therminport Quality Control B.V.).
• Low gloss matte sheets have the 85° gloss not greater than 15 GU and the matte products made therefrom have the 85° gloss not greater than 25 GU.
• adhesion for each of the matte sheets of Examples 1 to 6 and Comparative Examples 1 to 4 and the matte product made therefrom, the adhesion of the matte coating layer to the substrate is measured according to the method of ASTM 3359. The adhesion of the matte coating layer to the substrate can be classified into the following levels:
• a ratio of a peeling area of the matte coating layer to a total area of the matte coating layer is 0, which represents the best adhesion of the matte coating layer to the substrate;
• a ratio of a peeling area of the matte coating layer to a total area of the matte coating layer is greater than 0 and less than 5%;
• a ratio of a peeling area of the matte coating layer to a total area of the matte coating layer is from 5% to less than 15%;
• a ratio of a peeling area of the matte coating layer to a total area of the matte coating layer is from 15% to less than 35%
• a ratio of a peeling area of the matte coating layer to a total area of the matte coating layer is from 35% to less than 65%;
• a ratio of a peeling area of the matte coating layer to a total area of the matte coating layer is not less than 65%, which represents the worst adhesion of the matte coating layer to the substrate.
• Abrasion resistance for each of the matte sheets of Examples 1 to 6 and Comparative Examples 1 to 4 and the matte product made therefrom, abrasion resistance of the matte coating layer is evaluated by measuring the difference between haze values of the matte coating layer before and after being rubbed with another matting coating layer of the same gloss.
• the haze value is measured according to the method of ASTM D1003 and can be classified into the following levels:
• ⁇ the difference of the haze values before and after being rubbed is less than 0.5%, which represents the best abrasion resistance
• Symbol “x” the difference of the haze values before and after being rubbed is greater than 1.5%, which represents the worst abrasion resistance.
• *R-986 is a waterborne resin available from Koninklijke DSM N.V., the Netherlands.
• *MD-1245 is a waterborne resin available from TOYOBO CO., Japan.
• *H-51 is a matting agent of the product SUNSPHERE ® H-51 available from Asahi Glass Co., Ltd., Japan, including silicon dioxide particles and having a particle size distribution (d 50 ) of 5 ⁇ m.
• *H-121 is a matting agent of the product SUNSPHERE ® H-121 available from Asahi Glass Co., Ltd., Japan, including silicon dioxide particles and having a particle size distribution (d 50 ) of 12 ⁇ m.
• *CX-100 is a cross-linking agent available from Koninklijke DSM N.V., the Netherlands.
• *Dispers 775 W is the commercial product Tego ® 775 w available from Evonik Resource Efficiency GmbH.
• the 85° gloss of each of the matte sheets can be controlled to range between 4 GU and 14 GU, and each of the matte coating layers can have great abrasion resistance and great adhesion to the substrate.
• the matte products that are respectively made from the matte sheets at a heating temperature of 500° C. and a draw ratio up to 3.3 during the vacuum forming process have the 85° gloss ranging from 6 to 24. It demonstrates that the low gloss matte sheets of these examples and the matte products made therefrom have great adhesion to the substrates and acceptable or even great abrasion resistance.
• the ratios of the particle size distribution (d 50 ) of the matting agent to the roughness (Ra) of the matte coating layers are respectively 11.46 and 12.10.
• the 85° gloss of the matte sheets are respectively 23 GU and 32 GU, and the 85° gloss of the matte products made from these matte sheets are respectively 26 GU and 50 GU.
• the matte sheets and matte products made therefrom of Comparative Examples 1 and 2 fail to comply with the low gloss standard.
• the matte product made from the matte sheet of Comparative Example 2 has relatively low abrasion resistance.
• the average thickness of the matte coating layers of the matte sheets of Comparative Examples 4 and 5 is 1.5 ⁇ m, and adhesion to the substrate and abrasion resistances of the matte sheets and the matte products made therefrom of these Comparative examples are worse.
• the matte sheet of the disclosure not only has low gloss with the 85° gloss being not greater than 15 GU but acceptable or even great adhesion to the substrate and abrasion resistance of the matte coating layer.
• the matte product made from the matte sheet of this disclosure also has low gloss with the 85° gloss not greater than 25 GU and acceptable or even great adhesion to the substrate and abrasion resistance of the matte coating layer.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
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• Chemical Kinetics & Catalysis (AREA)
• Nanotechnology (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Mechanical Engineering (AREA)
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• 2016
  • 2016-12-16 TW TW105141688A patent/TWI630108B/zh active
• 2017
  • 2017-02-13 CN CN201710075576.8A patent/CN108610985B/zh not_active Expired - Fee Related
  • 2017-07-05 US US15/641,393 patent/US20180171163A1/en not_active Abandoned

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